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WO1994025323A1 - Dessicateur d'air pour systeme de freinage a air comprime - Google Patents

Dessicateur d'air pour systeme de freinage a air comprime Download PDF

Info

Publication number
WO1994025323A1
WO1994025323A1 PCT/US1994/004600 US9404600W WO9425323A1 WO 1994025323 A1 WO1994025323 A1 WO 1994025323A1 US 9404600 W US9404600 W US 9404600W WO 9425323 A1 WO9425323 A1 WO 9425323A1
Authority
WO
WIPO (PCT)
Prior art keywords
flow paths
air dryer
port
canister
housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US1994/004600
Other languages
English (en)
Inventor
David Joseph Goodell
James Paul Koenig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honeywell International Inc
Original Assignee
AlliedSignal Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AlliedSignal Inc filed Critical AlliedSignal Inc
Priority to AU67992/94A priority Critical patent/AU673931B2/en
Priority to KR1019950704826A priority patent/KR960701764A/ko
Priority to EP94915902A priority patent/EP0696974B1/fr
Priority to JP6524494A priority patent/JPH08509681A/ja
Priority to DE69401930T priority patent/DE69401930T2/de
Publication of WO1994025323A1 publication Critical patent/WO1994025323A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/002—Air treatment devices
    • B60T17/004—Draining and drying devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • B01D53/261—Drying gases or vapours by adsorption

Definitions

  • This invention relates to an air dryer for a compressed air braking system.
  • Air dryers have been used for many years to remove moisture from the compressed air used in compressed air braking systems used on heavy vehicles. These air dryers are of two basic types.
  • the continuous flow type usually includes two separate desiccant beds and a timing mechanism to switch flow between the beds. When one of the beds is drying air, the other desiccant bed is being purged and regenerated.
  • Continuous flow systems are normally used in application with heavy air consumption, such as transit buses. On applications with lower air consumption requirements, such as line haul trucks, a single bed desiccant cartridge is used. A single bed requires a dedicated purge volume, which may be incorporated into the air dryer unit itself, or mounted remotely.
  • the present invention provides a twin-bed continuous flow air dryer of the same or smaller size of prior art single bed air dryers.
  • the drying capacity of a desiccant bed is a function of the length to diameter (L/D) ratio of the bed, a higher L/D ratio being more efficient than a lower L/D ratio desiccant bed. Accordingly, the present invention provides a double helix insert in the desiccant canister, thereby dividing the canister into pneumatically isolated, serpentine, intertwined desiccant beds.
  • Each of the desiccant beds has a relatively high length to diameter ratio as compared to prior art air dryers .
  • Figure 1 is a cross-sectional view of a continuous flow air dryer made pursuant to the teachings of the present invention
  • an air dryer generally indicated by the numeral 10 includes a desiccant canister 12 mounted on a housing 14 containing a shuttle valve generally indicated by the numeral 16.
  • the housing 14 includes a supply port 18, which is communicated to a source of compressed air, such as the vehicle air compressor; a pair of purge ports 20 and 26, which are communicated to ambient atmosphere; an unloading port 22, which receives a pressure signal communicated by the vehicle compressor unloader; and a control port 24, which is communicated to a timed control signal, that is, a signal controlled by a timed solenoid valve which communicates a pressure signal to the control port 24 for a predetermined time period and then exhausts the signal from port 24 to atmosphere for an equivalent time period.
  • the desiccant canister 12 includes a circu ferentially extending wall 28 bounded by upper and lower end walls 30, 32.
  • End wall 32 is provided with circumferentially extending seals 34 which sealing engage the housing 14, and is also provided with a threaded connection 36 which engages threaded stud 38 when the canister 12 is installed on the housing 14.
  • a cover member 40 cooperates with the end wall 30 to define a delivery chamber 42 therewithin.
  • a delivery check valve 44 permits communication from the delivery chamber 42 to a delivery port 46, but prevents communication in the reverse direction. Delivery port 46 is communicated to appropriate storage reservoirs (not shown) .
  • a double helix insert generally indicated by the numeral 48 is installed within the canister 12.
  • the insert 48 includes a central stem 50 and a radially extending, axially inclined, continuous fin 52 projecting from the stem 50.
  • the outer periphery of the fin 52 engages the circumferentially extending wall 28 of the desiccant canister 12.
  • Opposite sides of the fin 52 cooperate to define a first flow path 54 and a second flow path 56. Because the flow paths 54, 56 are defined by opposite sides of the fin 52, the flow paths 54, 56 are intertwined in that the flow path 54 wraps around the flow path 56 and the flow path 56 wraps around the flow path 54, as illustrated in the drawings.
  • each of the flow paths 54 and 56 define a serpentine path extending between the bottom and top of the desiccant canister 12. Both of the flow paths 54 and 56 are filled with desiccant beads, a few of which are indicated as at 58.
  • the fin 52 maintains pneumatic isolation between the flow paths 54 and 56.
  • the upper end plate 30 is loaded downwardly by a spring 60 in the delivery chamber 42 to maintain pressures on the desiccant beads 58.
  • a one-way check valve 62 permits communication from the flow path 56 into the delivery chamber 42, but prevents communication in reverse direction.
  • another one-way check valve 64 permits communication between the flow path 54 in the delivery chamber 42, but prevents communication in the reverse direction.
  • a flow restricting orifice 66 permits communication, at a limited rate, from the delivery chamber 42 into the flow path 56 when the pressure in the flow path 56 drops below that in the delivery chamber 42, and another flow restricting orifice 68 similarly permits limited communication from the delivery chamber 42 into the flow path 54 when the pressure in flow path 54 drops below that in delivery chamber 42.
  • the housing 14 includes a passage 70 which communicates with the flow path 54 and another passage 72 which communicates with the flow path 56.
  • the shuttle valve 16 controls communication between the supply port 18 and the passages 70 and 72, between the passage 70 and the purge port 26, and between the passage 72 and the purge port 20.
  • shuttle valve 16 includes a stem 74 having enlarged valve elements 76, 78 mounted on opposite ends thereof.
  • Valve element 76 cooperates with a valve seat 80 circumscribing purge port 26 to control communication through purge port 26 and the valve element 78 cooperates with valve seat 82 to control communication through the purge port 20.
  • An inlet valve member 84 is mounted on a sleeve 86 which is slidably mounted on the stem 74.
  • Valve member 84 cooperates with circumferentially extending valve seat 88 to control communication between inlet or supply port 18 and the passage 70.
  • another inlet valve member 90 is integral with a sleeve 92 which is also slidably mounted on the stem 74.
  • Valve member 90 cooperates with valve seat 93 to control communication between the supply inlet port 18 and the passage 72.
  • a spring 94 yieldably urges the valve members 84, 90 apart, so that the ends of the sleeves 86, 92 are yieldably urged towards the corresponding valve member 76 or 78.
  • a piston 96 includes an extension 98 that is secured to the valve member 78 so that the piston 96 is able to position the shuttle valve 16 within the housing 14.
  • a spring 100 yieldably urges the piston 96, and therefore the shuttle valve 16, to the right, viewing the Figures.
  • the piston 96 is controlled by the pressure signals communicated through control port 24.
  • An unloader piston 102 is responsive to the pressure level at unloader port 22 and includes an extension 104 which engages the piston 96 when the unloader port 22 is pressurized and the pressure at control port 24 is vented, as illustrated in Figure 3.
  • the position of the shuttle valve as illustrated in Figure 1 is the position it assumes when the compressor is on load (and thus the unloader port 22 is vented) and the control port 24 is pressurized.
  • piston 96 is urged to the left, viewing Figure 1, thereby causing valve member 78 to close off communication between the purge port 20 and passage 72 and causing the valve member 76 to open purge port 26 to thereby vent passage 70 and flow path 54 to atmosphere.
  • valve element 90 is moved away from valve seat 93, permitting communication between the supply port 18 and the passage 72 and therefore to the flow path 56.
  • compressed air communicates through the flow path 56, and out of the check valve 62 into the delivery chamber 42.
  • Flow is communicated out of deliver chamber 42 and into the aforementioned reservoir (not shown) through the check valve 44.
  • the flow path 54 is communicated to atmosphere and thus is depressurized. Accordingly, since the pressure level and flow path 54 is now less than the pressure in delivery chamber 42, limited communication through the flow restricting orifice 68 purges the desiccant in the flow path 54.
  • control port 24 is vented. Accordingly, spring 100 acting against piston 96 moves the piston 96, and therefore the shuttle valve 16, to the right, viewing the Figures, into the position illustrated in Figure 2.
  • the purge port 26 is closed and communication is established between supply port 18 and passage 70, and therefor into the flow path 54, thereby pressurizing flow path 54 to deliver compressed air into the deliver chamber 42.
  • valve member 90 is engaged with valve seat 36, thereby cutting off communication between supply or inlet port 18 and the passage 72.
  • the valve member 78 is also moved over away from the valve seat 82, thereby communicating passage 72, and therefore the flow path 56, to atmosphere through the purge port 20.
  • flow path 56 is depressurized, permitting limited communication through the flow restricting orifice 66 between the delivery chamber 42 and the desiccant within the flow path 56 to thereby purge the desiccant 58 therein, in a matter well known to those skilled in the art.
  • the pressure at the control port 24 will again be switched, thereby moving the shuttle valve 16 back into the Figure l position. Accordingly, the shuttle valve 16 is moved between the position illustrated in Figures 1 and 2 on a periodic timed basis as long as the compressor remains on load.
  • Figure 3 illustrates the position of the components when the compressor goes off load.
  • the passage 70 is communicated to purge port 26 and the passage 72 is communicated to purge port 20, thereby simultaneously depressurizing both of the flow paths 54, 56. Accordingly, both of the fluid paths 54 and 56 are simultaneously purged by fluid pressure in the delivery chamber 42 communicating through flow restricting orifice 66, 68 until the pressure in the delivery chamber 42 reaches atmospheric pressure.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Drying Of Gases (AREA)
  • Multiple-Way Valves (AREA)

Abstract

Un dessicateur d'air pour système de freinage à air comprimé comprend un récipient (12) à déshydratant pourvu d'une pièce d'insertion (48) à double hélice qui coopère avec les parois (28, 30, 32) dudit récipient (12) pour définir une paire de passages d'écoulement (54, 56) entrelacés, en serpentins, pneumatiquement isolés. Les passages d'écoulement (54, 56) traversent le récipient (12), d'une paroi d'extrémité à l'autre (30, 32) et sont remplis d'un déshydratant (58). Un seul mécanisme à soupapes axiales réalise la commutation entre les passages d'écoulement de sorte qu'un des passages d'écoulement est purgé au moment ou l'autre passage d'écoulement est sous pression.
PCT/US1994/004600 1993-05-04 1994-04-26 Dessicateur d'air pour systeme de freinage a air comprime Ceased WO1994025323A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AU67992/94A AU673931B2 (en) 1993-05-04 1994-04-26 Air dryer for a compressed air braking system
KR1019950704826A KR960701764A (ko) 1993-05-04 1994-04-26 압축공기 제동시스템용 공기건조기(air dryer for a compressed air braking system)
EP94915902A EP0696974B1 (fr) 1993-05-04 1994-04-26 Dessicateur d'air pour systeme de freinage a air comprime
JP6524494A JPH08509681A (ja) 1993-05-04 1994-04-26 圧縮空気ブレーキ装置用空気乾燥機
DE69401930T DE69401930T2 (de) 1993-05-04 1994-04-26 Lufttrockner für druckluftbremssystem

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/057,598 US5286282A (en) 1993-05-04 1993-05-04 Continuous flow air dryer with double helix split desiccant bed
US08/057,598 1993-05-04

Publications (1)

Publication Number Publication Date
WO1994025323A1 true WO1994025323A1 (fr) 1994-11-10

Family

ID=22011597

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1994/004600 Ceased WO1994025323A1 (fr) 1993-05-04 1994-04-26 Dessicateur d'air pour systeme de freinage a air comprime

Country Status (7)

Country Link
US (1) US5286282A (fr)
EP (1) EP0696974B1 (fr)
JP (1) JPH08509681A (fr)
KR (1) KR960701764A (fr)
AU (1) AU673931B2 (fr)
DE (1) DE69401930T2 (fr)
WO (1) WO1994025323A1 (fr)

Cited By (1)

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WO2023186404A1 (fr) * 2022-03-29 2023-10-05 Zf Cv Systems Europe Bv Cartouche de dessiccateur d'air, unité d'alimentation en air, système pneumatique et véhicule

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US8414690B2 (en) * 2009-08-21 2013-04-09 Bringham Young University Off gas purification
US9067168B2 (en) * 2010-05-28 2015-06-30 Exxonmobil Upstream Research Company Integrated adsorber head and valve design and swing adsorption methods related thereto
EP2641648B1 (fr) * 2010-11-15 2019-08-21 Nabtesco Automotive Corporation Silencieux, soupape d'évacuation, dispositif soupape, sécheur d'air, dispositif d'alimentation en air comprimé pour un véhicule et système d'alimentation en air comprimé
JP5744624B2 (ja) * 2011-02-10 2015-07-08 ナブテスコオートモーティブ株式会社 バルブ装置、エアードライヤ、圧縮空気供給システム
AU2012223487A1 (en) * 2011-03-01 2013-09-19 Exxonmobil Upstream Research Company Apparatus and systems having compact configuration multiple swing adsorption beds and methods related thereto
US9017457B2 (en) 2011-03-01 2015-04-28 Exxonmobil Upstream Research Company Apparatus and systems having a reciprocating valve head assembly and swing adsorption processes related thereto
DE102011054329A1 (de) * 2011-10-10 2013-04-11 Haldex Brake Products Gmbh Lufttrocknungskartusche
US8999045B2 (en) 2012-01-05 2015-04-07 Suburban Manufacturing, Inc. Regenerative air dryer
US8852327B1 (en) 2013-03-14 2014-10-07 Haldex Brake Products Corporation Air dryer cartridge with integrated check valve
DE102013109476A1 (de) * 2013-08-30 2015-03-05 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Verfahren und Einrichtung zur Regeneration eines Zweikammer-Lufttrockners
AU2015294518B2 (en) 2014-07-25 2019-06-27 Exxonmobil Upstream Research Company Apparatus and system having a valve assembly and swing adsorption processes related thereto
CN105822792A (zh) * 2016-06-08 2016-08-03 肇庆市福昌净化科技有限公司 一种气控压差式换向总成
US10994239B2 (en) * 2018-03-08 2021-05-04 Sandisk Technologies Llc Spiral gas adsorption apparatus and method of using the same
PL4029747T3 (pl) * 2021-01-19 2024-06-03 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Urządzenie do osuszania powietrza i urządzenie do oczyszczania powietrza
US12377380B2 (en) * 2021-10-14 2025-08-05 Arizona Board Of Regents On Behalf Of Arizona State University Passive CO2 capture device with a helical sorbent structure
US11913441B2 (en) * 2021-12-29 2024-02-27 Transportation Ip Holdings, Llc Air compressor system having a hollow piston forming an interior space and a check valve in a piston crown allowing air to exit the interior space

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DE2520307B2 (de) * 1974-05-14 1977-12-08 Svenska Luftkompressor AB, Norrahammar (Schweden) Verfahren und vorrichtung zum erzeugen getrockneter druckluft in motorfahrzeugen, insbesondere fuer bremssysteme
DE3011725C2 (de) * 1980-03-26 1982-09-16 Knorr-Bremse GmbH, 8000 München Lufttrockner für eine Druckluftanlage
EP0053850B1 (fr) * 1980-12-09 1985-02-13 SAB Automotive AB Déshydrateur pour air comprimé
EP0075105A1 (fr) * 1981-09-17 1983-03-30 WABCO Westinghouse Fahrzeugbremsen GmbH Dispositif déssiccateur d'air pour installations à air comprimé
US4536198A (en) * 1982-11-15 1985-08-20 Hydro-Dri Systems, Inc. Moisture control device
US4581047A (en) * 1984-04-19 1986-04-08 Sab Automotive Ab Compressed air drier
US4892569A (en) * 1987-02-23 1990-01-09 Nippon Air Brake Co., Ltd. Compressed air pressure supply system
EP0365066A1 (fr) * 1988-10-18 1990-04-25 Haldex Aktiebolag Tour pour la dessiccation de l'air
EP0497570A1 (fr) * 1991-01-29 1992-08-05 Bendix Limited Appareil de séchage de gaz

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023186404A1 (fr) * 2022-03-29 2023-10-05 Zf Cv Systems Europe Bv Cartouche de dessiccateur d'air, unité d'alimentation en air, système pneumatique et véhicule

Also Published As

Publication number Publication date
DE69401930T2 (de) 1997-06-19
JPH08509681A (ja) 1996-10-15
DE69401930D1 (de) 1997-04-10
EP0696974A1 (fr) 1996-02-21
KR960701764A (ko) 1996-03-28
AU673931B2 (en) 1996-11-28
US5286282A (en) 1994-02-15
EP0696974B1 (fr) 1997-03-05
AU6799294A (en) 1994-11-21

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